scripts: Adopted json -> is_json tweak, avoiding name conflict

This was a humorous name conflict that went unnoticed only because we
lazily import json in read_csv.

scripts/code.py

@@ -892,10 +892,10 @@ def read_csv(path, Result, *,
 
     with openio(path, 'r') as f:
         # csv or json? assume json starts with [
-        json = (f.buffer.peek(1)[:1] == b'[')
+        is_json = (f.buffer.peek(1)[:1] == b'[')
 
         # read csv?
-        if not json:
+        if not is_json:
             results = []
             reader = csv.DictReader(f, restval='')
             for r in reader:

scripts/cov.py

@@ -747,10 +747,10 @@ def read_csv(path, Result, *,
 
     with openio(path, 'r') as f:
         # csv or json? assume json starts with [
-        json = (f.buffer.peek(1)[:1] == b'[')
+        is_json = (f.buffer.peek(1)[:1] == b'[')
 
         # read csv?
-        if not json:
+        if not is_json:
             results = []
             reader = csv.DictReader(f, restval='')
             for r in reader:

scripts/csv.py

@@ -1350,10 +1350,10 @@ def collect_csv(csv_paths, *,
         try:
             with openio(path) as f:
                 # csv or json? assume json starts with [
-                json = (f.buffer.peek(1)[:1] == b'[')
+                is_json = (f.buffer.peek(1)[:1] == b'[')
 
                 # read csv?
-                if not json:
+                if not is_json:
                     reader = csv.DictReader(f, restval='')
                     # collect fields
                     fields.update((k, True) for k in reader.fieldnames or [])

scripts/ctx.py

@@ -1152,10 +1152,10 @@ def read_csv(path, Result, *,
 
     with openio(path, 'r') as f:
         # csv or json? assume json starts with [
-        json = (f.buffer.peek(1)[:1] == b'[')
+        is_json = (f.buffer.peek(1)[:1] == b'[')
 
         # read csv?
-        if not json:
+        if not is_json:
             results = []
             reader = csv.DictReader(f, restval='')
             for r in reader:

scripts/data.py

@@ -892,10 +892,10 @@ def read_csv(path, Result, *,
 
     with openio(path, 'r') as f:
         # csv or json? assume json starts with [
-        json = (f.buffer.peek(1)[:1] == b'[')
+        is_json = (f.buffer.peek(1)[:1] == b'[')
 
         # read csv?
-        if not json:
+        if not is_json:
             results = []
             reader = csv.DictReader(f, restval='')
             for r in reader:

scripts/perf.py

@@ -1253,10 +1253,10 @@ def read_csv(path, Result, *,
 
     with openio(path, 'r') as f:
         # csv or json? assume json starts with [
-        json = (f.buffer.peek(1)[:1] == b'[')
+        is_json = (f.buffer.peek(1)[:1] == b'[')
 
         # read csv?
-        if not json:
+        if not is_json:
             results = []
             reader = csv.DictReader(f, restval='')
             for r in reader:

scripts/perfbd.py

@@ -1227,10 +1227,10 @@ def read_csv(path, Result, *,
 
     with openio(path, 'r') as f:
         # csv or json? assume json starts with [
-        json = (f.buffer.peek(1)[:1] == b'[')
+        is_json = (f.buffer.peek(1)[:1] == b'[')
 
         # read csv?
-        if not json:
+        if not is_json:
             results = []
             reader = csv.DictReader(f, restval='')
             for r in reader:

scripts/stack.py

@@ -895,10 +895,10 @@ def read_csv(path, Result, *,
 
     with openio(path, 'r') as f:
         # csv or json? assume json starts with [
-        json = (f.buffer.peek(1)[:1] == b'[')
+        is_json = (f.buffer.peek(1)[:1] == b'[')
 
         # read csv?
-        if not json:
+        if not is_json:
             results = []
             reader = csv.DictReader(f, restval='')
             for r in reader:

scripts/structs.py

@@ -1033,10 +1033,10 @@ def read_csv(path, Result, *,
 
     with openio(path, 'r') as f:
         # csv or json? assume json starts with [
-        json = (f.buffer.peek(1)[:1] == b'[')
+        is_json = (f.buffer.peek(1)[:1] == b'[')
 
         # read csv?
-        if not json:
+        if not is_json:
             results = []
             reader = csv.DictReader(f, restval='')
             for r in reader: